Terminal and Communication Method for Uplink Control Channel Transmission

1. A terminal comprising: circuitry, which, in operation, in a slot having allocated thereto both an uplink control channel (PUCCH) and an uplink channel (PUSCH) that includes uplink data, in a case where a difference between a power spectrum density (PSD) of the PUCCH and the PSD of the PUSCH is greater than a threshold value, drops a symbol of the PUSCH in a transmission interval for the PUSCH overlapping with a transmission interval for the PUCCH; and in a case where the difference is less than or equal to the threshold value, does not drop the symbol of the PUSCH in the transmission interval for the PUSCH overlapping with the transmission interval for the PUCCH; and a transmitter, which, in operation, transmits at least the PUCCH in the slot.

2. A terminal comprising: circuitry, which, in operation, in a slot having allocated thereto both an uplink control channel (PUCCH) and an uplink channel (PUSCH) that includes uplink data, in a case where a difference between a power spectrum density (PSD) of the PUCCH and the PSD of the PUSCH is greater than a threshold value, drops a portion of resources of frequency resources to which the PUSCH is allocated in a transmission interval for the PUSCH overlapping with a transmission interval for the PUCCH; and in a case where the difference is less than or equal to the threshold value, does not drop the portion of resources of the frequency resources to which the PUSCH is allocated in the transmission interval for the PUSCH overlapping with the transmission interval for the PUCCH; and a transmitter, which, in operation, transmits the PUCCH, and the PUSCH for which the portion of the resources has been dropped, in the slot.

3. A terminal comprising: circuitry, which, in operation, in a slot having allocated thereto both an uplink control channel (PUCCH) and an uplink channel (PUSCH) that includes uplink data, in a case where a difference between a power spectrum density (PSD) of the PUCCH and the PSD of the PUSCH is greater than a threshold value, changes a transmission format of the PUCCH; and in a case where the difference is less than or equal to the threshold value, does not change the transmission format of the PUCCH; and a transmitter, which, in operation, transmits the PUCCH obtained after the transmission format has been changed, and the PUSCH, in the slot.

4. The terminal according to claim 1 , wherein, in a case where the transmission interval for the PUCCH and a portion of the transmission interval for the PUSCH are superposed, the circuitry, in operation, sets a transient period in an interval that does not overlap with the transmission interval for the PUCCH, within the transmission interval for the PUSCH.

5. The terminal according to claim 2 , wherein a unit for a frequency resource quantity at which the PUSCH is dropped is defined, and a transport block or a code block included in the PUSCH is mapped to frequency resources in the unit.

6. The terminal according to claim 3 , wherein, in a case where the transmission format has been changed from a short PUCCH to a long PUCCH, the circuitry, in operation, carries out power scaling for the long PUCCH.

7. A communication method, comprising: in a slot having allocated thereto both an uplink control channel (PUCCH) and an uplink channel (PUSCH) that includes uplink data, in a case where a difference between a power spectrum density (PSD) of the PUCCH and the PSD of the PUSCH is greater than a threshold value, dropping a symbol of the PUSCH in a transmission interval for the PUSCH overlapping with a transmission interval for the PUCCH; and in a case where the difference is less than or equal to the threshold value, refraining from dropping the symbol of the PUSCH in the transmission interval for the PUSCH overlapping with the transmission interval for the PUCCH; and transmitting at least the PUCCH in the slot.

8. A communication method, comprising: in a slot having allocated thereto both an uplink control channel (PUCCH) and an uplink channel (PUSCH) that includes uplink data, in a case where a difference between a power spectrum density (PSD) of the PUCCH and the PSD of the PUSCH is greater than a threshold value, dropping a portion of resources of frequency resources to which the PUSCH is allocated in a transmission interval for the PUSCH overlapping with a transmission interval for the PUCCH; and in a case where the difference is less than or equal to the threshold value, refraining from dropping the portion of resources of the frequency resources to which the PUSCH is allocated in the transmission interval for the PUSCH overlapping with the transmission interval for the PUCCH; and transmitting the PUCCH, and the PUSCH for which the resources has been dropped, in the slot.

9. A communication method, comprising: in a slot having allocated thereto both an uplink control channel (PUCCH) and an uplink channel (PUSCH) that includes uplink data, in a case where a difference between a power spectrum density (PSD) of the PUCCH and the PSD of the PUSCH is greater than a threshold value, changing a transmission format of the PUCCH; and in a case where the difference is less than or equal to the threshold value, refraining from changing the transmission format of the PUCCH; and transmitting the PUCCH obtained after the transmission format has been changed, and the PUSCH, in the slot.

10. The terminal according to claim 2 , wherein, in a case where the transmission interval for the PUCCH and a portion of the transmission interval for the PUSCH are superposed, the circuitry, in operation, sets a transient period in an interval that does not overlap with the transmission interval for the PUCCH, within the transmission interval for the PUSCH.

11. The terminal according to claim 3 , wherein, in a case where the transmission interval for the PUCCH and a portion of the transmission interval for the PUSCH are superposed, the circuitry, in operation, sets a transient period in an interval that does not overlap with the transmission interval for the PUCCH, within the transmission interval for the PUSCH.